Has anyone replaced their receiver/radio with better equipment?

I have a 2WD Slash that I race in a stock class and want to use my Futaba radio with a R304SB-E receiver but I'm curious as to whether or not the telemetry will work with the XL-5 ESC (since I can't replace the ESC and still run stock class).

All that said, having never used telemetry, what I'm asking may be total nonsense, I understand that.

Thanks in advance for the help.

- Chappy